Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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A Study of Oscillation Characteristics of Supersonic Fluidic Oscillator With Shared Feedback Channel

공유피드백 유로를 갖는 초음속 유체진동기의 진동특성에 관한 연구

  • Lee, SeungHeon (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Park, SangHoon (Dept of Aerospace and Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Ko, HeeChang (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Seo, SongHyun (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Lee, Yeol (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2019.10.03
  • Accepted : 2020.02.18
  • Published : 2020.03.01
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Abstract

A study of flow characteristics of supersonic fluidic oscillators with shared feedback channel inside was carried out. Unsteady CFD analysis were performed and the numerical results were validated by comparison with the experimental ones observed for the same operation conditions. It was found that the mass flow between individual oscillators through the shared feedback channel directly influenced on the oscillating flow mechanism inside the oscillator, and finally on the synchronization of the jet oscillations. It was also observed that the oscillator with shared feedback channel provided higher pressure loss as well as higher oscillation frequency as compared to the single oscillator of the same geometric shape.

내부에 공유피드백 유로를 갖는 공유형 초음속 유체진동기에서 나타나는 유동특성에 관한 연구가 수행되었다. 비정상 전산유체역학적 해석이 수행되었고 수치해석 결과는 동일한 운용조건에서 수행된 실험결과와 비교 검증되었다. 수치해석 결과, 공유피드백 유로가 해당 유체진동기의 진동 메커니즘에 큰 영향을 주어 진동기 출구 각 제트유동의 동조화에 큰 역할을 하고 있음이 확인되었다. 공유형 유체진동기는 동일 형상의 단일형 유체진동기와 비교하여 진동수가 증가하나 압력손실 또한 커짐이 확인되었다.

Keywords

References

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